package com.ndhutu.ee.util;

import java.security.MessageDigest;

public class MD5Util {

    public static String encode32(String str){
        StringBuffer buf = new StringBuffer("");
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(str.getBytes());
            byte b[] = md.digest();
            int i;
            for (int offset = 0; offset < b.length; offset++) {
                i = b[offset];
                if(i<0){
                    i+= 256;
                }
                if(i<16){
                    buf.append("0");
                }
                buf.append(Integer.toHexString(i));
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return buf.toString();
    }

    public static String MD5(String s) {
        char hexDigits[]={'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};

        try {
            byte[] btInput = s.getBytes("UTF-8");
            // 获得MD5摘要算法的 MessageDigest 对象
            MessageDigest mdInst = MessageDigest.getInstance("MD5");
            // 使用指定的字节更新摘要
            mdInst.update(btInput);
            // 获得密文
            byte[] md = mdInst.digest();
            // 把密文转换成十六进制的字符串形式
            int j = md.length;
            char str[] = new char[j * 2];
            int k = 0;
            for (int i = 0; i < j; i++) {
                byte byte0 = md[i];
                str[k++] = hexDigits[byte0 >>> 4 & 0xf];
                str[k++] = hexDigits[byte0 & 0xf];
            }
            return new String(str);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public static void main(String[] args) {
        System.out.println(encode32("123456"));
        System.out.println(MD5("&AppRandomQuickPayHtml&1598943689706680&20200825143630XX9F5BA31292664988&28.0&CNY&ALIPAY&49854093&http://test.mm.api.ppmkf.com/mm-api/wallet/zfpaiPayNotify&http://test.mm.api.ppmkf.com/mm-api&http://test.mm.api.ppmkf.com/mm-api&充值投诉与客服微信：ppshejiao&充值投诉与客服微信：ppshejiao&20200825143630XX64FAE6AA55FA4DED"));
    }
}
